swapping lightner with a darkner
like ralsei and kris or lancer and susie
its a simple idea yet i beardly see it

swapping bosses with the main characters
like king and susie, queen and Burghley, spamton and noelle, jevil and kris

swapping the themes of each darkworld
like cyberworld could be a bored game world and have kard kingdom be well computer now.

having susie,kris or ralsei be spamton and have the Thrash Machine be their neo form.

this one is just dumb but swapping tasque manager and ralsei

even dumber jevil and tasque manager, heck mabye even rouxls and spamton

eating chips with bread

(well thats all i had to say, if you read to this point. why?)